Study of Arlocabtagene Autoleucel (BMS-986393) a GPRC5D-directed CAR T Cell Therapy in Adult Participants With Relapsed or Refractory Multiple Myeloma

Inclusion Criteria * Documented diagnosis of multiple myeloma (MM) as per International Myeloma Working Group (IMWG) criteria. * Received at least 4 classes of MM treatment \[including immunomodulatory drug (IMiD), proteasome inhibitor (PI), anti CD38 mAb, anti-BCMA therapy, and at least 3 prior lines of therapy (LOT). * Documented disease progression during or after their last anti-myeloma regimen as per IMWG 2016 criteria. * Participants must have measurable disease during screening. * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. Exclusion Criteria * Active or history of central nervous system involvement with MM. * Active systemic fungal, bacterial, viral, or other infection despite appropriate anti-infective treatment at the time of leukapheresis. Participants with severe infection, severe sepsis or bacteremia in the last 28 days prior to leukapheresis are excluded. * Received any prior therapy directed at G protein-coupled receptor class C, group 5, member D (GPRC5D) or has received other prior treatment for MM without the required washout prior to leukapheresis. * Other protocol-defined Inclusion/Exclusion criteria apply.